v.ast: add a mod field to ast.FnTypeDecl too

cmd/tools/vast/vast.v

@@ -897,6 +897,7 @@ fn (t Tree) fn_type_decl(node ast.FnTypeDecl) &Node {
 	mut obj := create_object()
 	obj.add_terse('ast_type', t.string_node('FnTypeDecl'))
 	obj.add_terse('name', t.string_node(node.name))
+	obj.add_terse('mod', t.string_node(node.mod))
 	obj.add_terse('is_pub', t.bool_node(node.is_pub))
 	obj.add_terse('typ', t.type_node(node.typ))
 	obj.add('pos', t.pos(node.pos))

vlib/v/ast/ast.v

@@ -1522,6 +1522,7 @@ pub mut:
 pub struct FnTypeDecl {
 pub:
 	name          string
+	mod           string
 	is_pub        bool
 	typ           Type
 	pos           token.Pos

vlib/v/parser/parser.v

@@ -2782,6 +2782,7 @@ fn (mut p Parser) type_decl() ast.TypeDecl {
 		p.attrs = []
 		return ast.FnTypeDecl{
 			name:          fn_name
+			mod:           p.mod
 			is_pub:        is_pub
 			typ:           fn_type
 			pos:           decl_pos